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Home >> Subaru >> 2021 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2.5L) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0506: Idle Control System Rpm - Lower Than Expected >> Execution Condition
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Execution Condition

Secondary parameters Execution condition
Battery voltage ≥ 10.9 V
Barometric pressure ≥75.1 kPa (563 mmHg, 22.2 inHg)
Lambda value (left and right) ≥0.85 and < 1.151
Vehicle speed = 0 km/h (0 MPH)
Engine coolant temperature ≥60°C (140°F)
Elapsed time after starting the engine ≥10s
Time of no change in park/neutral position switch ≥5s
Cold start diagnosis Not in operation
Main feedback In operation
Idle speed control feedback In operation